On Fri, Apr 5, 2019 at 1:26 PM Peter Zijlstra wrote:
>
> On Fri, Apr 05, 2019 at 10:00:03AM -0700, Stephane Eranian wrote:
>
> > > > +static void update_tfa_sched(void *ignored)
> > > > +{
> > > > + struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
> > > > + struct pmu *pmu = x86_
On Fri, Apr 05, 2019 at 10:00:03AM -0700, Stephane Eranian wrote:
> > > +static void update_tfa_sched(void *ignored)
> > > +{
> > > + struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
> > > + struct pmu *pmu = x86_get_pmu();
> > > + struct perf_cpu_context *cpuctx =
> > > thi
On Fri, Apr 5, 2019 at 12:13 AM Peter Zijlstra wrote:
>
> On Thu, Apr 04, 2019 at 11:32:19AM -0700, Stephane Eranian wrote:
> > diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
> > index a4b7711ef0ee..8d356c2096bc 100644
> > --- a/arch/x86/events/intel/core.c
> > +++ b/arch
On Thu, Apr 04, 2019 at 11:32:19AM -0700, Stephane Eranian wrote:
> diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
> index a4b7711ef0ee..8d356c2096bc 100644
> --- a/arch/x86/events/intel/core.c
> +++ b/arch/x86/events/intel/core.c
> @@ -4483,6 +4483,60 @@ static ssize_t fr
This patch provides guarantee to the sysadmin that when TFA is disabled, no PMU
event is using PMC3 when the echo command returns. Vice-Versa, when TFA
is enabled, PMU can use PMC3 immediately (to eliminate possible multiplexing).
$ perf stat -a -I 1000 --no-merge -e branches,branches,branches,bra
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